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-rw-r--r--modules/book/book.module2
1 files changed, 1 insertions, 1 deletions
diff --git a/modules/book/book.module b/modules/book/book.module
index 94ca85386..30969a1ca 100644
--- a/modules/book/book.module
+++ b/modules/book/book.module
@@ -332,7 +332,7 @@ function book_outline($nid) {
* Handles book outline form submissions.
*/
function book_outline_submit($form_id, $form_values) {
- $op = $_POST['op'];
+ $op = $form_values['op'];
$node = node_load($form_values['nid']);
switch ($op) {